The OSPAAAL logo

The Organisation of Solidarity with the People of Asia, Africa and Latin America or Organización de Solidaridad con los Pueblos de Asia, África y América Latina is a Cuban political agency set up to disseminate the ideology of the Cuban Revolution. It was set up in the wake of the 1966 Tricontinental Conference in Cuba in 1966 and spreads its left leaning message via Tricontinental magazine. OSPAAAL's posters were distributed with the magazine. A number of Cuba's best designers have produced posters for the agency.
OSPAAAL's logo is particularly striking. It uses a dramatic angular design with outstretched arm clenching a gun set against a globe. I do not know who designed the logo but it still looks good 40 years after its creation.